Automatic lathe for high speed work



March 21, 1933.. A. BECHLER 1 902,754

AUTOMATIC LATHE FOR HIGH SPEED WORK I Filed May 20, 1952 4 Sheets-Sheet 1 Zia/ nter:

LE flair; 2e c1184 ifMi/ March 21, 1.933. A. BECHLER AUTOMATIC LATHE FOR HIGH SPEED WORK Fi led May 20, 1952 4 Sheets-Sheet 2 A. BECHLER AUTOMATIC LATHE FOR HIGH SPEED WORK March 21, 1933.

Filed May 20, 1932 4 Sheets-Sheet 5 aw III A v enfor'.

March 21, 1933. BECi-ILER 1,902,754"

AUTOMATIC LATHE FOR HIGH SPEED WORK Filed May 20, 1932 4 Sheets-Sheet 4 Patented Mar. 21. 1933 UNITED STATES PATENT oFF oa BEGHLEB. r MOUTIER, I$Z LAN AUTOMATIC LATHE non nren srnnn worm.

Application filed May 20., 1932, Serial No. 612,594, and in Switzerland April 30, 1 932.

The present invention relates to auto-' matic lathes for high speed work of the kind where the baseof the head stock-projects to some extent on the side of the tool and carries a tail stock enember connected to the head stock by means-of one or several rods. Such lathes are especially'useful for high speed work onmetals or on synthetic resins composedof caseines etc, which when being turned will produce a very bulky heap of shavings. Since the high speed lathes can only be utilized with advantage when the movements of the different tools are-very quick it is of; the greatest importance that the masses carrying the different tools he as" small as possible. But in such lathes the bulks of the moving parts have not yet been reduced to a considerable amount and so the maximum output could not be obtained. It is the object of the present invention to reduce considerablythe bulk of, the moving parts and the invention consists there.- forein that at least one of the connecting rods-carries a head wherein at least one spindleacts as a tool holder and turns at a different speed from that of the mainspindle and is adapted to be moved longitudinally, coa'xiallyor not, with the main spindle,

, while the head does not participate in such movements. 1

The annexed drawings represent some examples of lathes according to the present invention. There is:

Fig. 1 is aside elevation, Fig. 2 a plan, a Fig. 3 a cross-section on line III-III' in Fig. 1, Fig. 4 an end elevation seen from the 46 right of Fig. 1

Fig. 5 a cross-section on line V.V l and y I V Fig, 6 asectional view of another form of a detail.

4 Figs. 7 to 11 refer to a second form of the invention, 7

Fig. 7 is a side elevation, Fig. 8 a plan, Fig. 9 a cross-section on line IXIX in Fig. 7, Fig. 10 an end view and Fig. 11 a crosssection on line XIXI of Fig. l.

Fig. 12 is a detail view of a third form of the invention. a I p The lathe as represented has a troughshaped basel upon which are mounted on one side a hollow casing 2 with the head stock and on the other side a standard 3 with the tail stock. Both casing and standard are connected the rods 4: and 5. These rods are rigid and rod 4 carries a movable head 6 clamped fast by means of a clamp 7 This head comprises a bearing 8 with .a'tool holder spindle 9 adaptedto be moved longitudinally' and rotatably by a loose pulley 10 moved from a disk 12 fast to the spindle 9 and two rods 11 screwed to thepulley and stuck across-two holes of the disk.

A spring 13 is inserted between'the' bearing 8 and the disk 12 and tends to keep the spindle bearing ona piston 14 which is slidinglyheld within the standard 3and con-- tacts with a lever'lfi pivotally held bya bracket 17 and controlled "by-a cam 15. The cam 15 is driven from the main shaft'tit by means of the helicoidal gear 19 andt'heiir' v termediate sh-a-ft 18. r The work piece, in this 7 case a rod of metal, is stuck through the head stock :20 provided with a driving pulley 21 and is fed by a combination of nippers or dogs not shown within reach of the tools 22 which are moved in slidesby means of cams sheltered within the hollow casing 2, It is easily seen that with this arrangement it willbe possible to work upon the, work piece which has been partially 'prepared by the tools 22 with a drill 23"either during the turning 'processby giving to t'Ffe spindle a speed suited to that of the work 7 piece or after having. stopped the Work piece by drilling into ll turned off face de 0 he Weak pi c an e cent cal o In the ar ng ment acc rd ng in Fig- .6 the pindle 9 is etated by mea s f e r ds 11 screwed into the lease pin en and 9 5 taken along by a disk 12 fast to $11 spindle 9. Pinion 25 meshes with a pinion 26 which". iscast in one piece with the driving pulley 2. 3 i i l bwing to the'faet that the head is 3 shaft 38, transmitsto the tools 36, 37 the to rod 4 by clamping only it may be swung out on this rod and be adjusted into different positions with regard to the turning aXlS- If there are several spindles like 9 carry ing drills of different diameter or cutters and taps the moving of the head around the rod which carries the same may be controlled in any suitable mannernfor instance by means of a hollow shaft extending to the end of the standard and provided with means combined with cams which like the cam 15 could be arranged at the end of the shaft 18 sheltered from the shavings by the'standa'rd'. i

lntheworkingform as in Figs. 7, 8, 9

i and 10 we see the same kind of lathes. All

the different parts: the base 1, the casing 52, the standard 3 and the rods and the movable head 6 are to be found here as in thebefore, described lather; The head 6, how-- ever comprises here a two part housing 6 rigidly connected toa hollow shaft rotatably mounted in the casing 2 and the standard 3. On the outer side of this latter the shaft 30 carries a pinion 31 meshing with a toothed segment 32 which is pivoted in 33 and bears with a friction roller 34 on the edge of a cam 35 fixed to the shaft ,18. This cam will control the positions of the head 6 and will bring one time the one tool andthe other time the other tool, 36 or 37, into, line with the turning axis. The rotating movement is given to these tools ,by a shaft 38 arranged within the hollow shaft 30rand provided with a gear wheel 39 meshing with wheel 40 fast to the main spindle offthela the, A spur gear system 41, the first wheelfof which is keyed to the required rotation each time' that by the movements of the cam 35 they will come into line with the piston 14 which, herealso is operated by alever 16 and a cam v15 as in the former examples.

, v Fig. 9 shows the arrangementof the tools 22 for the slicing operation. The cams working lthese tools arearranged within the vhollow casing 2.

The cams 15 and 35, arranged as they are, are entirely sheltered from the shavings -which are produced in 'the space between the head and the tail stock.

In the working form according "to Fig. 12 the head 6 comprises six different tools disposed at 60 from each other. These tools are marked only diagrammatically. They are supported by a hollow rod 30 comprising an inner axis '38 which is driveirfrom the gears in-the head-stock and are ad usted in their respective positions by '7 means of toothed segments 31, 32 or by any other mechanical device for instance bymeans of the well known Maltese cross.

positions of the toolsis assured by a pawl 43 which engages notches 42 in the periphery of the head 6.

What I claim as new is:

1. In an automatic lathe for high speed work and in combination, a head stock hava hollow base provided with a trough-like extension towards the tail stock, a tail stock mounted upon said extension and connecting rods between head stock and tail stock,

a head comprising a housing enclosing the tool with driving means and mounted on one of the rods, a spindle, a" tool holder slidingly and rotatably held within said housing and a piston-like member held slidingly in the tail stock and adaptedto serve as an axial abutment for the working'tool.

2. In an automatic lathe for high speed work of the kind described, and in combination, a head stock having a hollow base provided with a trough-like extension towards the tail-stock, a tail stock mounted upon said extension and connecting rods between 'theworking tool. 7 v 3.-In an automatic lathe for high speed work of the kind described, and in combination, a head stock having a hollow base provided with atrough-like extension towards the tail stock,va tail stock mounted upon said. extension and connecting rods betweenhead stock and tail stock, :ahead comprising'a housing enclosing the tool with driving means and mounted angularly ad; justable on one of the rods leftfhollow, a: driving shaft arranged within saidhollow shaft, at least one spindle, as tool holder, held 'slidingly and rotatabl1ywithin said ing the means for transmitting,.movement from the said driving shaft tofthe spindle, a piston-like member heldislidingly in" the tail stock to constitute an axial abutment for the spindle and a systemlofcams and levers operated from the main "shaft and adapted to guide said piston like member.

In testimony whereof I afiix my signature.

ANDRE BEGHLER.

The exact 1 housing, a system of spurwheelsconstitut- 

